• Connect LINE 1 (L1) of SP180to PHONE2 of VOIP, LINE 2 (L2) to the telephone line.
• If the VOIP use a DC power supply, you can remove the DC jack from VOIP, and plug it into DC IN jack of SP180. Then connect DC OUT to the VOIP with the DC power wire (included). The power range is between 9V and 20V, AC or DC, regardless polarity.
• From the connection diagram above, the PHONE2 jack (an FXS port) of VOIP is supposed to connect to a telephone set. By installing SP180, it can connect to a telephone line, work as an FXO port.
• If there are 2 or more SP180are applied, user can share one DC power adaptor, connect as below:

• Slide the switch to L1_L2, it becomes to the one-way mode. SP180will only answer the call from L1. When the switch is set at L1_L2, both SP180will answer calls from both L1 and L2 (two-way mode).

Tuning Busy Tone Frequency Detection

• The SP180 automatically release both lines when a busy tone is detected. As there are several busy tone in this world, so it is necessary to tune the detecting frequency before the first use.

• Connect the device according to the connecting diagram Prepare a screw driver (must match the VR, variable resistor on the top side)
• Use the screw driver to push down the TEST button. Tuning the VR and observe the LED. When the red light comes complete light, the tuning is done. After few seconds, the LED will flash, and hang up the line.

Operation and Indication

LINE 1 to LINE 2

1. During idle mode, the LED blinks in different colors.

• Red - Normal stand by
• Yellow - L1 to L2 password enabled (refer to advanced feature)
• Green - L1 to L2 auto call forwarding enabled (refer to advanced feature)

2. During normal stand by mode, when ring comes from LINE 1, LED becomes green, SP180 will auto engage the line, and connect it to LINE 2. The caller can hear the dial tone from LINE 2 and then make a call from this telephone line. If the number dial out is engaged, SP180 will cut the connection when busy tone is heard.

3. When the caller wants to hang up the LINE 2, press #, #. LINE 2 will be disconnected and then connect again after 1.3 seconds. User can make another call.

4. If the caller hangs up the telephone, SP180will recover to idle model, LED will blink again.

LINE 2 to LINE 1

• Under one-way mode, the call from LINE 2 will not activate SP180. Password and auto call forwarding features only effect for the call Line1 to Line2.
• Under 2-way mode, when ring comes from LINE 2, LED becomes red, SP180will auto engage the line, and connect it to LINE 1. The caller can hear the dial tone from LINE 1 and then make a call from this telephone line. If the number dial out is engaged, SP180will cut the connection when busy tone is heard.
• When the caller wants to hang up the LINE 1, press #, #. LINE 1 will be disconnected and then connect again after 1.3 seconds. User can make another call.
• If the caller hangs up the telephone, SP180will recover to idle model, LED will blink in yellow again.